Part a - using the definition for mole fraction. a solution was prepared by dissolving 140.0 g of kcl in 305 g of water. calculate the mole fraction of kcl. (the formula weight of kcl is 74.6 g/mol. the formula weight of water is 18.0 g/mol.) express the mole fraction of kcl to two decimal places. view available hint(s) χ χ = nothing part b - use the definition of molality a solution was prepared by dissolving 140.0 g of kcl in 305 g of water. calculate the molality of kcl. (the formula weight of kcl is 74.6 g/mol. the formula weight of water is 18.0 g/mol.) express the concentration of kcl in molality to two decimal places. view available hint(s) express the concentration of in molality to two decimal places. 0.16 mol/kg 0.01 mol/kg 6.15 mol/kg 0.10 mol/kg